Toroidal coil winding machine



. TOROIDAL COIL WINDING MACHINE Filed Jan. 4, 1950 7 Sheets-Sheet l ILA INVEN TORS M. 0. BENNER T HECRADDUCK A 7' TO/PNEV Nov. 3, 1953 M. o. BENNERT ET AL 2,657,865,

TOROIDAL COIL WINDING MACHINE Filed Jan. 4, 1950 7 Sheets-Sheet 2 5 b i O f 8 i m v a g g R ljlfilf v I G .VS' IIIEBUI O "J I W a) Q p m lww k O k p Q a a q Q x g 33 W1 M N a: a Q g g MQBENNERT 'NVENTORS HE'CRADDUCK By LTQPMLSR ATTORNEY Nov. 3, 1953 M. o. BENNERT ET AL 2,657,865

TOROIDAL COIL WINDING MACHINE 7 Sheets-Sheet 3 Filed Jan. 4, 1950 /NVEN7 O/Q$ M O.BENN RT HECRADDUCK WM 9.x

A T TO/QNEV Nov. 3, 1953 M. o. BENNERT ET AL 2,657,865

TOROIDAL COIL WINDING MACHINE Filed Jan. 4, 1950 Z Sheets-Sheet 4 /Nl EN 7095 M. O. BENNER T H. E. CRADDUCK A TTOPNEV Nov. 3, 1953 Filed Jan. 4, 1950 M. O. BENNERT ET AL 7 Sheets-Sheet 5 k In S Q 5 b I N Y *0 8 5 N A "3 & WM w a} Q 3. 3- N & 8 ilid o L 3 'lf g 2% s INVENTORS MOBEN/VERT H.E.CRADDUCK ATTORMEV Nov. 3, 1953 Filed Jan. 4, 1950 M. O. BENNERT ETAL' TOROIDAL COIL WINDING MACHINE 7 Sheets-Sheet 6 a N N VE N TORS M. aae/v/vmr H.. CRADDUCK A T TORNfV Nov. 3, 1953 M. o. BENNERT ETAL 2,657,865

TOROIDAL COIL WINDING MACHINE Filed Jan. 4, 1950 7 Sheets-Sheet 7 INVEN raps M. OBENNERT H. E. CRA DDUCK A TTO/PNEY Patented Nov. 3, 1953 TOROIDAL COIL WINDING Malcolm 0. Cradduck,

Bennert, Methuen, and Henry E. Amesbury, Mass., assignors to Western Electric Company, Incorporated, New York,- N. Y., a corporation of New York Application January 4, 1950, Serial No. 136,696 16 Claims. (Cl. 242-4) This invention relates to toroidal coil winding machines, and more particularly to hydroelectric automatically operable toroidal coil winding inachines.

In the manufacture of toroidal coils, it is common practice to form layer windings on the core and the patent to A. L. Quinlan 2,341,650 has introduced bank winding in toroidal coils. .The bank winding of the Quinlan structure is ac omplished by the aid of a handle on the core chuck for manual oscillation of the core chuck between variable limits solely under the control of the operator to create bank winding on portions of the core.

An object of the present invention is to provide a toroidal coil winding machine capable of the conventional layer winding and of selectively forming right or left bank windings on a core.

With this and other objects in view, the invention comprises a toroidal coil winding machine having a core chuck to support a toroidal core at a given position relative to a shuttle, for a supply of strand material to be wound on the core, driven in a circular path through the core, a rocking shaft having the support mounted thereon whereby the center of the core will be coincident with the axis of the shaft. The rocking shaft is driven between variable limits by a means capable of forming different types of winding of the strand material on the core.

More specifically, the operation of the shuttle and the core chuck are under the control of hydroelectric means, arranged whereby through the actuation of one switch, the strand material will be wound in smooth continuous layers back and forth between the limits on one side of the coil through a total rotation of 180 forming what is known as layer winding on the core. Through the operation of another switch, right bank: winding of the strand material is formed on approximately 90 of the core during shorter rotations of the rocking shaft. I'he hydroelectric means rotates the core chuck quickly to its starting position, moves it slowly for a given distance, quickly reverses back toward the starting position, stops and again rotates slowly in the winding direction. This process repeats until the core has rotated through approximately 90. The amount of travel of each bank is short when close to the ends of the winding and a full length between these and portions. By operating another switch, left bank winding is formed over approximately 90 of the core in a similar manner but in reverse directions as is required for the right bank winding. These respective windings are formed on the remaining portions of the cores by changing the positions of the cores in the core chuck.

other objects and advantages will be apparent from the following detailed description, when considered in conjunction with the accompanying drawings, wherein:

Fig. 1 is a fragmentary side elevational view of the toroidal coil winding machine;

Fig. 2 is a schematic illustration of a portion of the control mechanism;

Fig. 2A is a schematic illustration of the remaining portion of the control mechanism;

Fig. 2B is an enlarged fragmentary isometric view of a portion of the control mechanism;

Fig. 2C is an enlarged sectional view of the control table and rack;

Figs. 3 and 3A combined compose a wiring diagram of the electrical features of the machine;

Fig. 4 is a fragmentary top plan view of the core chuck and core illustrating the formation of layer winding;

Fig. 5 is a fragmentary top plan view of the core chuck and core illustrating right bank winding; and a Fig. 6 is a fragmentary top plan view of the core chuck and core illustrating left bank winding.

Referring now to the drawings, attention is first directed to Fig. 1 which illustrates a core chuck 20 having relatively movable jaws 2| and 22 to firmly clamp a core 23 therebetween. The mechanism for actuating the jaws 2| and 22 is disposed in a housing 24 and is under the control of a hand lever 25, this mechanism being dis closed in a. copending application Serial No. 75,644, filed February 10, 1949, now Patent No. 2,603,892. The housing 24 is mounted on the upper end of a rocking shaft 26 journalled in suitable bearings 21 and having a sprocket 28 mounted thereon and operatively connected thereto through a spring pressed ball 29 of a chuck 30. I

A shuttle 33, for receiving a supply of strand material such as insulated wire 34, is supported for rotation through the core 23 to wind the strand material on the core. Rotatably mounted rollers 35 and 36 support the shuttle 33, the rollers 35 being free to rotate while the roller 38 is fixedly mounted on a shaft 31 to be driven by the mechanism hereinafter described. The rollers may be provided with the conventional gear teeth for positive connection with an inner ring gear on the shuttle. The shuttle and the supporting rollers are of the conventional type and further detailed description thereof is not believed necessary.

Attention is now directed to Figs. 2 and 2A which show the mechanical and hydraulic means for operation under the control of the electrical circuits shown in Fig. 3. The sprocket 28 for the chuck 20 shown at the lower portion of Fig. 2A is driven by a chain 40 having its ends connected to the opposing ends of piston rods M and 42 of a piston 43 in a cylinder 44. The chain 40 also travels about a sprocket 45 mounted on a shaft 48 which has a sprocket 41 mounted on the opposite end thereof. A chain 48 extends about the sprocket 41 and has one end connected to the adjacent end of a stop bar 49 and the other end connected to the adjacent end of a control table 50. The control table 50 is mounted in a groove of a support 52 for movement longitudinally in a guided path therein (Fig. 20). A similar idler sprocket 53 has a chain 54 extending therearound with its ends connected respectively to the stop bar 49 and the control table 50. The stop bar is of a given length and has stops 58 and 51 mounted at selected positions thereon, the main portions of the stops having switch engaging surfaces 58 and 59, while their outer portions are of reduced thicknesses providing offset surfaces 80 and GI. The surface 58 of the stop 58 is positioned to actuate limit switches 64 and 85, while the surface 59 of stop 51 is positioned to actuate limit switches 81 and 88. The surface 80 of the stop 58 is positioned to actuate a limit switch 10, while the surface SI of stop 51 is positioned to actuate a limit switch H.

The control table has a longitudinal groove 12 in its upper surface and limit switches 13 and 14 mounted at the ends thereof, positioned to be actuated by the respective ends of a rack supported in the groove 12 for movement relative to the control table and the limit switches thereon. The rack is engaged by a pinion 18 on a shaft 19 which is driven by pawls 80 and 8| and ratchets 82 and 83 upon energization of solenoids 84 and 85 respectively. The shaft 19 is supported by stationary bearings 86 and provided with a predetermined constant braking force at 81, whereby the pinion 18 will be disposed at a fixed position holding the rack 15 against movement with the control table 50 and under the complete control of the solenoids 84 and 85. Looking toward the ends of the shaft 19, the units, including the solenoid operable pawls and. sprockets, are in this embodiment of the invention the same as that shown in Fig. 23. Although these units are the same, they function to rotate the shaft 19 in opposite directions. The unit shown in Fig. 23 includes the core for the solenoid 84 connected to the free end of a pivoted lever 88 by a link 88'. The lever 88 is normally held against a stop 88 by a spring 89'. The pawl 80, which is pivotally supported by the lever 88 intermediate its ends, is normally urged counterclockwise against its stop 80 by its spring 80". In the normal positions of the units with the solenoids 84 and 85 deenergized, the pawls 80 and 8I are away from their sprockets leaving the shaft 19 under the control of a brake 81. The brake 81 applies a given holding force to the shaft to cause the pinion 18 to hold the rack 15 against movement with the control table during reciprocation thereof. However, the rack may be moved in either direction with or against the movement of the control table 50 through the energization of either solenoid 84 or and the operation of their respective pawls and ratchets. Upon de energization of the solenoids the pawls are immediately returned to their normal positions free of their ratchets.

Attention is now directed to Fig. 2A which discloses a portion of the power means for operating the machine. An electric motor 90 has its shaft 9I connected to an input shaft 92 of a hydraulic unit 93 through a coupling 94. The hydraulic unit is of a commercially known type having an output shaft 95 and under the control of foot pedal 96 whereby the unit will give an output speed or rotary movement to the output shaft 95 of zero to six hundred revolutions per minute with a constant maximum torque. The output shaft 95 is connected to a one-way clutch 91 and through the clutch to a gear pump 98 and a piston pump 99 through a sprocket and chain connection I09. The gear pump 93 and the piston pump 99 are commercial units and their detailed structure need not be shown. An indicating unit I02 is connected through shafts I03 and I04 and intermediate gears I05 to the piston pump 99 to register the output of the pump.

The one-way clutch 91 drives a shaft I91, a sprocket and chain connection I08 and a shaft I09 which is connected to a shaft IIII through a magnetic clutch III. The shaft 31, driving the shuttle 33, is operatively connected to the shaft I I0 through beveled gears I I2, the conventional connecting mechanism for the shuttle being under the control of a hand wheel II4. A counter unit II5 to indicate the revolutions of the shutt1e is driven through a sprocket and chain connection IIB from the shaft II9. An arm II8 shown in Figs. 1 and 2a, constituting a part of the shuttle mechanism, is positioned to operatea safety switch II9 when the shuttle mechanism is in readiness for operation.

The motor 90 drives a rapid traverse gear pump I22 through gears I23 and I24. The pump I22 is connected to a supply tank I25, which is to contain the main supply of fluid such as 011 for use in the hydraulic system, this connection being embodied in line I25. The outlet of the rapid traverse gear pump I22 is indicated at I21 and connects with lines I28 and I29 of solenoid valves I30 and I3I. The valves I30 and I3I are shown in their normal or deenergized positions.

Referring first to solenoid valve I30, it will be noted that line I28 communicates with passageway I34 and through line I35 to the top of the cylinder 44, while the other passageway I38 connects a line I31 from the bottom of the cylinder 44 with a line I38 which leads to the solenoid valve I3I. When the solenoid I30 is energlzed, the lines are in a sense reversed in that the passageways I34 and I39 are replaced by passageways I40 and MI, passageway I40 connectmg lines I35 and I38, and passageway I4I connecting lines I28 and I31.

When the solenoid valve I3I is in its normal or deenergized position, line I38 will be connected to a line I44 through a passageway I45 which enters a line I46 between relief valves i4? and I49, extending from the piston pump at I49 to the bottom of the tank I25 at I50. The line I29 is connected through a passageway I52 to a line I53 leading to the bottom of the tank I25. An arcuate passageway I55 connects lines H29 and I44 when the solenoid valve I3I is energized and at the same time an arcuate passageway I56 connects lines I38 and I53.

A supply line I60 leads from the tank I25 to the supply portions of the gear pump 96. An output line I6I for the pumps 08 and 99 is connected to a line I62, a portion of Which extends upwardly to the hydraulic unit 93, while another portion extends through a relief valve I63 to the bottom of the tank I25 at I64.

Attention is now directed to Fig. 3 which illustrates the wiring diagram of the electrical circuits of the control mechanism for the machine. At the top of the figure, the supply lines I65 for the motor 90 are shown including a start switch I66. In the present embodiment of the invention, the other circuits include lines I10 and I ll supplied with a suitable electrical energy from a transformer I12. The magnetic clutch III is in a circuit from line I10 at connections I13 and I14 through rectifiers I15 and I15 in parallel, suitable resistances I18, safety switch H9 when closed, and normally closed contacts 589 in the counter unit M5, to line I1I at connection IBI.

There are four manually operable switches, the selective operation of which determines the type of winding to be performed by the machine. A switch 200 is included in a circuit with the winding of a relay 20I having break contacts 202, 203 and 294 and make contacts 205, 206, 201, 208 and 299. A switch 2I0 is in a circuit with the Winding of a relay 2| I having break contacts 2I2, 2 I4, 2I5 and 2I6 and make contacts 2I1, 2I8, 2I9 and 220. The switches 200 and 2I0 are of the type which remain in any position in which they are disposed until they are moved into another position, while switches 225 and 226 are of the type which are normally open and will return to open position when released. The switch 225 is in a circuit with the winding of a relay 221 which has break contacts 228, 229 and 230 and make contacts 23I and 232. The switch 226 is in a circuit with the winding of a relay 235 which has break contacts 236, 231 and 238 and make contacts 239 and 240. The wiring diagram, including the various electrical circuits will be explained more in detail during the description of the operation of the machine.

Upon considering the operation of the machine for winding any of the forms shown in Figs. 4, and 6, it is necessary that the core 23 be clamped in the core chuck 20 and that the shuttle 33 be supplied with the necessary amount of Wire or strand material 34. These operations are performed in the conventional manner, an added precaution being embodied in the safety switch II9 under the control of the arm II6 which is in a position to close the switch when the shuttle is ready for operation. Let it be assumed that the machine is to perform layer winding as shown in Fig. 4. This may be accomplished by first closing the switch I 66. The switch 225 is then closed completing a circuit from line I10, at connection 245, through switch 225, winding of relays 221 and connection 246 to line I1I at connection 241. Energization of the relay 221 will break contacts 226, 229 and 230 and make contacts 23I and 232. A single contact 250 is under the control of a double relay having a latch winding 25I and a trip winding 252. When contact 23I of relay 221 is closed, a circuit is completed from line I10 at connection 253, through a break contact 254 of a relay 255, through contact 23!, winding 252, connection 256 to line I1I at connection 241. Energization of the winding 252 assures opening of the contact 250 which is in a circuit including the solenoid I 30, this circuit extending from line I10 at connection 258 through contact 250 when closed, solenoid I 30 to line I1I at connection 259. Furthermore, the making of contact 232 energizes the solenoid valve I3I completing a circuit from line I10 at connection 253 through break contact 254, connection 260, contact 232, connection 26I, solenoid I3I, to line I1I at connection 262. In the present instance therefore, the solenoid valve I3I is energized while the solenoid valve I30 is deenergized causing a rapid movement of the core chuck 20 clockwise or to the left. The gear pump I22 is always pumping oil at a rapid rate from line I26 through line I21. When the solenoid valve I3I is deenergized, this oil is allowed to pass through line I29, passageway I 52 and line I 53 to the main supply tank I25. However, when the solenoid valve I3I is energized, line I29 is connected through passageway I55 to lines I44 and I46. This results in cutting on the escapement of the oil from the rapid traverse pump I22 to the tank I 25 and adds it to the oil from the pumps 98-99 through line I28, and the selected passageway I34 or I36 in the valve I 30 to cause rapid return movement of the piston 43 with the chuck 20 and core 23. Furthermore, energization of the solenoid valve I3I connects line I38 through passageway I56 and line I53 to the tank I25 for a rapid exhausting of the oil on the opposite side of the piston 43.

The rapid return of the chuck 20, for example to the left, through the operation of the piston 43 causes the shaft 46 to rotate, moving the mechanism shown in Fig. 2 until the stop 56 or the surface 58 thereof closes limit switches 64 and 65. Closing of limit switch 64 results in the energization of the relay 255 by completing a circuit from line I10 at connection 265, through break contact 202, limit switch 64, relay 255 to line I1I at 262, energizing the relay to break contact 254. Although the winding 252 is deenergized, contact 250 will remain open. However, breaking of contact 254 results in the deenergization of the solenoid valve I3 I, stopping the movement of the piston 43 and the chuck 20 and locating the chuck with the core at the starting position. At this time, the operator having conditioned the machine for layer winding, locating the core chuck at the left starting position, the switch 225 is released, the limit switches 64 and 65 remaining closed and relay 221 being deenergized allowing the contacts thereof to return to their normal positions. The operator then presses the pedal 96 causing oil to flow from the piston pump 99 through line I49, relief valve I41, line I44, passageway I45, line I39, passageway I36 and line I31, to the lower portion of the cylinder 44. The speed of movement of the piston in the cylinder and likewise the speed of movement of the chuck is under the control of the pump 99 which is under the direct control of the hydraulic unit 93. The gear pump 98 and the piston pump 99 are driven at a speed directly proportional to the output speed of the hydraulic unit. The gear pump 98 supplies makeup oil to the hydraulic unit 93 through the upper portion of line I62 and supplies oil to the piston pump at approximately fifty pounds pressure. The piston pump 09 may therefore be called a ieed'pump as it moves the core chuck 20 whenever the hydraulic unit is driving the shuttle forward or in the winding direction. Due to the one way clutch 91, the pump will not move the chuck while the shuttle is rotating in the opposite direction unless solenoid I3I is energized and the rapid traverse pump flow is used. The solenoid valve I30 merely provides for a two directional movement of the piston 43 and the chuck 20.

As soon as the operator presses the foot pedal 06 and the fluid to the cylinder 44 causes movement of the chuck to the right or counterclockwise, the stop 56 is moved away from the limit switches 64 and 65 opening the circuit to the relay 255 and allowing its contact 254 to close. This operation continues during the winding of a layer of wire on the core during rotation of the core through approximately 180 until the stop 51 through its surface 50 closes the limit switches 61 and 68. Closing of limit switch 61 completes a circuit through the winding of a relay 28l from line I10 at connection 265, through break contact 202 of relay 20I, connection 282, limit switch 61, relay 28I to line I1I at connection 241. Energization of the relay 28I opens its break contact 283. The closing of the limit switch 68 energizes the winding 25I of the double relay closing the contact 250 by completing a circuit from line I10 at connection 285 through break contact 228 of relay 221, break contact 231, of relay 235, through limit switch 68, break contact 203 of relay 20I, through the winding 25I, connection 256 to line I'll at connection 241. Energization of the winding 25I closes the contact 250 completing the circuit through the solenoid valve I30 reversing the flow of the oil. The mechanism driven by the piston 43 will start movement of the core chuck 20 in the reverse direction starting another layer of winding on the core. At the same time the stop 51 moves away from the limit switches 61 and 68, the circuit to the relay 28I opens resulting in the closing of the contact 283. The winding 25I also deenergizes, but the contact 250 remains closed as it will not be opened until the winding 252 is energized.

The operation continues until the stop 56 closes the limit switches 64 and 65. The switch 64 when closed energizes the winding of relay 255, opening contact 254 while the switch 65 when closed completes the circuit through the winding 252 to open the contact 250, deenergizing the solenoid I30 to again reverse the direction of flow of the oil to the cylinder 44. The circuit completed through the winding 252 by closing limit switch 65 may be traced from line I10 at connection 285 through break contact 220 of winding 221, break contact 231 of winding 235, connection 306, switch 65, break contact 204 of winding 20I, through winding 252 to line I1I at connection 241. This operation continues as long as the foot pedal is actuated forming repeated layers of strand material or wire on the core. During this operation, the operator determines the number of convolutions or windings on the core by observing the counter II which registers the number of revolutions of the shuttle 33. This completes the description of the operation of the winding machine to wind layers of wire on the core as shown in Fig. 4, the windings starting from the left.

If it should be desirable to form layer windings on the core starting from the right, the operator initially, instead of closing the switch 225 aspreviously described, closes the switch 226 which completes a circuit through a relay 235 from line I10, at connection 286, through switch 226, relay 235, connection 281 to line I1I at connection 241. Energization of the relay 235 breaks contacts 236, 231 and 238 and makes contacts 230 and 240. The winding 25I oi the double acting relays for contact 250 is energized by the closing of a circuit from line I10 at connection 230 through contact 283, closed contact 240, winding 25I, connection 256 to line I1I at connection 241. Energization of the winding 25I closes the contact 250 energizing the solenoid valve I30, causing the now of oil to the cylinder 44 to result in the movement of the core chuck to the right or counterclockwise so that during the subsequent operations, the shuttle 33 will begin winding the strand on the core while the core travels first to the left to wind the first layer of wire on the core. The subsequent operations are similar to those previously described, the stops 56 and 51 and their associated limit switches 64-65 and 61-68 reversing the travel of the core chuck at the completion of each layer of convolutions.

When it is desirable to form bank winding on the core, the core may be provided with dividers 200 of insulating material to separate the core for four windings. The first step taken in the operation of the machine for bank winding is the closing of switch 200 which converts the machine from layer winding operations to bank winding operations. By closing the switch 200 a circuit is completed from line I10 at connection 20L through switch 200, relay 20I, connections 202 and 246 to line I1I at connection 241. Energization of relay 20I breaks contacts 202, 203 and 204 and makes contacts 205, 206, 201, 208 and 200. The winding 25I of the double acting relay for contact 250 is energized to close the contact by the closing of a circuit from line I10 at connection 285, through contact 220 of relay 221, contact 231 of relays 235, contacts 201 and 206, successively of relay 20I, contact 2I2 of relay 2, through connection 203, winding 25I, connection 256 to line I1l at connection 241. This circuit, when closed, closes contact 250 and energizes the solenoid valve I30.

Let it now be assumed that it is desirable to do right bank winding as shown in Fig. 5. To locate the core chuck 20 at the starting position, switch 225 is pressed completing the circuit through the relays 221 energizing the relay to break contacts 228, 220 and 230 and to make contacts 23I and 232. This action deenergizes the winding 25I which effectively allows the contact 250 to remain closed. However, the winding 252 is energized by the closing of contact 23I and the contact 250 is opened, deenergizing the solenoid valve I30. The solenoid valve I3I is energized by the closing of contact 232 resulting in causing the piston 43 to move the core chuck to the left.

During the description of the operation of the machine for layer winding as shown in Fig. 4, no mention was made of the fact that limit switches 13 and 14 close at various times, the reason being that their circuits remain open at contacts 208 and 200 of relay 20I. The control table and the associated mechanism functions only during bank winding operations at which time the limit switches 13 and 14 are under the control of the rack 15 and added to the controls of the stops 56 and 51 to bring about the desired movements of the core chuck to create bank winding on the core. It will be understood that without energization of the solenoid 84 or closed position. through relay 255 from line I at connection 85, the pinion 18 would hold the rack against movement and movement of the control table 50 relative thereto during rocking movement of the core chuck and simultaneous movement of the stop bar 49 with its stops 56 and 51, would cause the roller carrying arms of the limit switches 13 and 14 to alternately ride upon their respective ends of the rack 15 and be actuated into closed positions. Furthermore, the time intervals between operations of the limit switches 13 and 14 would be constant if the solenoids 84 and 85 were not operated. Therefore, these time intervals may be varied by the energization of either solenoid 84 or 85 to actuate its pawl 80 or 8| to rotate the shaft 19 to move the rack 15 toward or away from the limit switches 13 and 14. Through this means, it is possible to vary the length of rocking movement of the core chuck and core, particularly at the ends of the bank windings to fill up the corners of the windings.

Returning to the last step described where the switch 225 had been pressed into closed position energizing relay 2'21, deenergizing winding I, energizing winding 252 to open contact 250 to deenergize solenoid I and energize solenoid I3I, resulting in rapid movement of the core chuck and core to the left. During this interval, the limit switch 13 rides upon the rack 15 and closes,

but nothing happens. Furthermore, stop 56 closes limit switches 64 and and nothing happens, the operation continuing until the surface 60 of stop 56 engages limit switch 10 and moves it into A circuit is then completed 265, through connection 300, closed contact 265 of relay 20], connection 30I, limit switch 10, relay 255 to line I1I at connection 262. Energization of relays 255 and open contact 254, de-

energizing winding 252 of the double acting relay at which time, the contact 250 remains open. Furthermore, solenoid I3I deenergizes through the opening of the contact 254 diverting the oil to the tank I25 stopping movement of the chuck 20 at the left where it remains stationary.

The necessary functions to set the machine for right bank winding having been completed, the operator releases the switch 225, opening the circuit to relay 221 allowing its contacts 228, 229

and 230 to close and contacts 23I and 232 to open. I A circuit to a relay 304' is completed from line I10 at connection 285, through contact 229 of relay 2'21, contact 231 of relay 235 through connection 306, limit switch 65, connection 301, contact 239 of relay 200, connection 308, contact 2I6 I of relay 2 through relay 304 to line I1I at connection 359. Energization of the relay 304 opens its contact 3I0 which is included in a circuit hereinafter described.

Another double acting relay has windings 3I I and 3I2 creating opposing actions on their contacts 3! 3 and 3M, the winding 3H opening the contacts simultaneously when energized where they will remain open until the winding 312 is energized causing them to close where they will remain closed until the winding 3 is again energized. Deenergization of the relay 221 also completes a circuit through the winding 3I2, this circuit including the major portion of the circuit previously described for relay 304 and extending from connection 3! 5 through break contact 3E6 of relay 3I1, through winding 3I2, connections 3m, H9 and 320 to line "I at connection 309. At the same time, winding 25! is energized closing contact 250 to energize solenoid valve I30. The circuit through the winding 25I, upon deenergization of the relay winding 229, may be traced from line I10 at connection 265, through contact 229 of winding 221, contact 231 of winding 235, connection 306, contacts 201 and 206 of winding 20I, contact 2I2 of winding 2I I, connection 293, winding 25I, connection 256 to line I1I at connection 241. During the interval of time, solenoid operates and through its pawl and ratchet 8I-83, the rack 15 is moved toward the limit switch 13. The circuit for the solenoid 85 is completed from line I10 at connection 285, through contact 229 of winding 221, contact 231 of winding 235, connection 306, contact 201 of winding 20I, contact 3l3 of winding 3I2, contact 230 of winding 235, contact 228 of winding 221, contact 2I4 of Winding 2I I, solenoid 85, connections 330 and 33I to line I1I at connection 241. Eventually the solenoid I 3| is energized when the limit switch 13 is closed whereby the rapid flow of oil will return the chuck rapidly to the right. When the switch 13 is closed a circuit is completed from line I10 at connection 285, contact 229 of winding 221, contact 231 of winding 235, connection 306, switch 65, connection 301, contact 209 of winding 20I, switch 13, contact 3| 4 of winding 3I2, contact 238 of winding 235, contact 230 of winding 221, solenoid I3I to line I at connection 262. When this takes place, the stop 56 releases the limit switch 10 allowing it to open and deenergizerelay 255 resulting in the closing of the contact 254. Furthermore, the rack 15 releases the limit switch 13 allowing it to open. Stop 56 then releases limit switches 64 and 65, both of which will open resulting in the deenergization of relay 304 and the closing of its contact 3I0. Furthermore, winding 3I2 is deenergized and contacts 3| 3 and 3| 4 remain closed.

The next step in the operation includesthe closing of the limit switch 14 by the rack 15 due to the movement of the table 50. At this time the relay 3I1 is energized, a circuit having been completed from line I10 at connection 285, through contact 220 of relay 221, contact 231 of relay 235, connection 306, contact 201 of relay 20!, limit switch 14, connection 3'22, contact 2I5 of relay 2! I, connection 323, relay 3| 1 and connections 3I9 and 320 to line HI at connection 309. Energization of the relay 3I1 opens its contact 3I6. The winding 3 energizes and causes opening of the contacts 3I3 and 3I4. The circuit through the solenoid 85 is opened on opening contact 3I3 which opens a circuit from line I10 at 285 through contacts 229, 231, 201, 3I3, 236, 228 and 2I4 through the solenoid 85, connections 330, 33I to line I1I at 241. Solenoid I3I is deenergized by opening of contact 3I4 resulting in the flow of the oil from the gear pump I22 to the tank I25 and thus stopping the flow of oil to the cylinder 44. The core chuck is stopped in this position where it is ready for the right bank winding. At this time, the operator presses down on the foot pedal 96 causing oil to flow through lines I49, I46 and I44 through solenoid I3I deenergized and solenoid I30 energized moving the piston 43 in the cylinder 44" slowly in a direction to move the core chuck to the left. During this operation, the rack 15 during relative movement of the control table and the rack causes actuation of the switch 14 to complete a circuit through winding 3 to hold the contacts 3I3 and 3 open. At the same time, relay M1 is energized under the control of the limit switch 14 opening the contact 3I6. During the next interval of operation, depending upon the relative position 65, first limit switch 13 of, first, the rack 15 with respect to the limit switch 13, or second, the relative position of the stop with respect to the limit switches 64 and or limit switches 64 and limit switch 64 will have no effect and limit switches 13 and are in parallel, then that effect will be the same. As the bank winding progresses, stop 56 will be further from limit switches 64 and 65 so that after a few banks of windings, limit switch 13 will be the actuating switch until the end of the bank is wound.

Returning to the present portion of the operation, stop 56 closes limit switches 64 and 65 at which time relay 304 energizes opening its contact 310. Winding 312 of the double acting relay energizes closing contacts 313 and 314. At the same time solenoid energizes operating its pawl 81 and ratchet 83 to advance the rack toward the limit switch 13 and away from limit switch 14. Also solenoid 131 energizes to cause a rapid return of the core chuck to the right. When this takes place, stop 56 moves free of the limit switches 64 and 65 allowing them to open at which time relay 304 deenergizes closing contact 310. The winding 312 of the double acting relay also deenergizes, but the contacts 313 and 314 remain closed. During the rapid reverse of the core chuck, the limit switch 14' rides upon the rack 15 and is operated into closed position. Relay 311 energizes opening its contact 316 and winding 311 of the double acting relay energizes opening the contacts 313 and 314. At this time solenoid 131 deenergizes diverting the flow of the oil from the rapid traverse pump 122 and through the control of the fluid from pumps 98 and 99, the core chuck moves slowl to the left. The limit switch 14 when moved free of the rack 15 is allowed to open and relay 311 is deenergized opening its contact 316. At the same time, the winding 311 deenergizes, but the contacts 313 and 314 remain open. It will be noted that since the rack 15 has been moved toward limit switch 13, at the same time stop 55 is moved away from limit switches 64 and switch 13 instead of stop 56 closing limit switches 64 and 65. During the next series of steps, relay 31'14 energizes opening its contact 310 and the winding 312 energizes closing the contacts 313 and 314. The solenoid 85 will then be energized effectively advancing the rack 15 toward the limit switch 13. The solenoid 131 then energizes again causing a rapid reverse of the core chuck. At the completion of the rapid reverse movement of the core chuck. limit switch 13 will be closed and this cycle will be repeated causing the winding of a given number of convolutions forming the banked layers on the core until stop 51 closes limit switches 61 and 68 instead of 65 will close, but since the rack 15 closing the limit switch 13. At that time, the bank of winding becomes shorter to fill in the corners as shown in Fig. 5 of the drawings. The machine is automatically stopped when the winding is completed at which time limit switches 13, 61 and 68 will be closed. The machine may also be stopped at this time or at any other time by returning the foot pedal 96 to its neutral position.

To set up the machine for operation in left bank winding instead of right bank winding, the foot pedal is returned to its zero or normal position and the necessary arrangement is made for mounting the core in the core chuck for left bank winding of the strand material thereon. It is not believed necessary to carry out the de c p- 65, the rack will close limit 4 tion for the complete winding of each core as it is understood that the winding of one-half the core in layer winding may be repeated on the other half the core to complete the winding of the core. Furthermore, in the description of the right bank winding, only one-fourth of the core was covered through the operation of the machine as previously described, but this operation may be repeated until the core is filled.

The first step in converting the machine from right bank winding to left bank winding is the closing of switch 210 which completes a circuit from line 118 at 335, through switch 210, through the winding of relay 211 connection 236 to line 211 at connection 241. Energization of the relay 211 opens its contacts 212,214, 215 and 216 and closes its contacts 211, 218, 219 and 226. The winding 251 of the double acting relay is deenergized by the opening of contact 212, but the contact 250 remains closed. However the winding 252 of this relay is energized by the closing of contact 211 opening the contact 250 and deenergizing the solenoid 130. The operator at this time presses the switch 226 into closed position completing a circuit from line 116 at connection 286 through relay 235, connection 281 to line 111 at connection 241. Energization of the relay 235 opens its contacts 236, 231 and 238 and closes its contacts 239 and 240. The winding 251 of the double acting relay energizes by the closing of contact 240, completing a circuit from line at connection 289 through contacts 283 and 249, winding 251, connection 256 to line 111 at connection 241. The contact 250 is thus closed energizing the solenoid valve 130. The solenoid valve 131 is also energized by the closing of the contact 239, the circuit being completed from line 116 at connection 289 through contacts 283 and 233 through connection 261, solenoid 131 to line 111 at connection 262.

The operation of the machine for left bank winding is very similar to the operation of the machine for right bank winding with the exception that the rapid and slow movements of the core chuck are reversed, thus reversing the lays of the bank windings on the core. Furthermore during the previous description for right bank winding, the controls for the movement of the core chuck were embodied in the limit switch 13, the limit switches 64, 65 and 10 under the control of the stop 56 and the operation of the solenoid 65. For left bank winding, the operation is substantially the same with the exception that the controls for the movement of the chuck are embodied in the limit switch 14 and its relationship with the rack 15, the limit switches 61, 68 and 11 and their relationship with the stop 51 and also the operation of the solenoid 84. In each instance during bank winding operations, rocking motions are imparted to the core to fill the starting corners, these motions increasing in length until the main rocking distance is reached after which repeated operations result in the winding of banked layers or convolutions of the wire on the core until the opposite end of the portion of the core is reached at which time shorter rocking motions are imparted to the core to fill up the corner.

It is to be understood that the above described arrangements are simply illustrative of the application of the principles of the invention. Numerous other arrangements may be readily devised by those skilled in the art which will embody the principles or the invention and fall within the spirit and scope thereof.

What is claimed is:

1. A toroidal coil winding machine comprising a chuck to support a toroidal core at a given position, a shuttle for a strand to be wound on the core, supported for movement in a circular path through the core, a rocking shaft having the chuck mounted thereon whereby the center of the core will be coincident with the axis of the shaft, a fluid operable unit to rock the shaft, and valves operated in a given sequence to control the flow of fluid to the unit to control the direction of movement of the shaft with the chuck and core relative to the shuttle,

2. A toroidal coil Winding machine comprising a chuck to support a toroidal core at a given position, a shuttle for a strand to be Wound on the core, supported for movement ina circular path through the core, a rocking shaft having the chuck mounted thereon whereby the center of the core will be coincident with the axis of the shaft, a fluid operable unit to rock the shaft, and valves operated in a given sequence operable to force a fluid into the unit to cause it to rock the shaft at a given speed whereby convolutions of the strand will be uniformly wound on the core from a starting position.

3. A toroidal coil winding machine comprising a chuck to support a toroidal core at a given position, a shuttle for a strand to be wound on the core, supported for movement in a circular path through the core, a rocking shaft having thechuck mounted thereon whereby the center of the core will be coincident with the axis of the shaft, a fluid operable unit to rock the shaft, a unit operable whereby a fluid under pressure may be directed into the unit to cause it to rock the shaft at a given speed whereby convolutions of the strand will be uniformly wound on the core from a starting position, a rapid reverse unit, and a valve to render the rapid reverse unit operable to cause a fluid to flow at a given velocity and pressure to the fluid operable unit to cause it to reverse the shaft with the chuck and core rapidly toward the starting position.

4. A toroidal coil winding machine comprising a a chuck to support a toroidal core at a given pOsi-' tion, a shuttle for a strand to be wound on the core, supported for movement in a circular paththrough the core, a rocking shaft having the chuck mounted thereon whereby the center of the core will be coincident with the axis of the shaft, 2. piston operatively connected to the shaft to rock the shaft through given degrees of rotation relative to a starting position, a power unit having a selectively variable output, means operatively connected to the power unit to drive the shuttle, and a fluid pump driven by the output of the power unit to force a fluid under varying pressures to the piston wherebythe shaft withthe chuck and core will be rocked from a starting position at a speed variable with variations in the speed at which the shuttle is driven to uniformly wind the strand on the core.

5. A toroidal coil winding machine comprising a chuck to support a toroidal core at a given position, a, shuttle for a strand to be wound on the core, supported for movement in a circular path through the core, a rocking shaft having the chuck mounted thereon whereby the center of the core will be coincident with the axis of the shaft, a piston operatively connected to the shaft to rock the shaft through given degrees of rotation relative to a starting position, a power unit having a selectively variable output, means operatively connected to the power unit to drive the shuttle, a. fluid pump driven by the output of the power unit to force a fluid under varying pressures to the piston whereby the shaft with the chuck and core will be rocked from a starting position at a speed variable with variations in the speed at which the shuttle is driven to uniformly wind the strand on the core, and a rapid traverse pump to force a fluid under a given high pressure to the piston to cause it to rock the shaft with the chuck rapidly toward the starting position.

6. A toroidal coil winding machine comprising a chuck to support a toroidal core at a given position, a shuttle for a strand to be wound on the core, supported for movement in a circular path through the core, a rocking shaft having the chuck mounted thereon whereby the center of the core will be coincident with the axis of the shaft, a piston operatively connected to the shaft to rock the shaft through given degrees of rotation relative to a starting position, a power unit having a selectively variable output, means operatively connected to the power unit to drive the shuttle, a fluid pump driven by the output of the power unit to force a fluid under varying pressures to the piston whereby the shaft with the chuck and core will be rocked from a starting position at a speed variable with variations in the speed at which the shuttle is driven to uniformly wind the strand on the core, a rapid traverse pump to force a fluid under a given high pressure to the piston to cause it to rock the shaft with the chuck rapidly toward the starting position, a valve actuable to direct the fluid from the said fluid pump to either side of the piston to cause the shaft with the chuck and core to move in either direction at selectively variable speeds, and an auxiliary valve actuable to direct the fluid under high pressure from the rapid traverse pump to the reversing side of the piston to cause the shaft with the chuck and core to move rapidly toward the starting position.

'7. A toroidal coil winding machine comprising a chuck to support a toroidal core at a given position, a shuttle for a strand to be wound on the core, supported for movement in a circular path through the core, a rocking shaft having the chuck mounted thereon whereby the center of the core will be coincident with the axis of the shaft, a unit actuable to rock the shaft with the chuck and core in either direction relative to a starting position, electrically operable power means to actuate the unit, electrical circuits under the control of limit switches to cause operation of the power means, a mechanism movable with the unit to control the power means whereby a bank wound coil may be wound on the core, and other controls in the mechanism to shorten the rocking motions of the core at the ends 'of the coil to make the coil uniform throughout its length.

8. In a toroidal coil winding machine having a chuck to support a toroidal core at a given position, and a shuttle, for a supply of wire to be wound on the core, supported for movement in a circular path through the core, power means to drive the shuttle to wind the wire on the core, a unit actuable by the power means to rock the chuck about the center of the core relative to given limits, electrical circuits controlled by manual switches and mechanically actuable limit switches, elements selectively energizable at given time intervals under the control of certain of the limit switches by the closing of certain of the manual switches to cause the shuttle to form layer winding of the wire on the core, and selectively energizable at given intervals under the control of all the limit switches by the closing of another manual-switch to cause the shuttle to form bank winding of the wire on the core.

9. In a toroidal coil winding machine having a chuck to support a toroidal core at a given position, and a shuttle, for a supply of wire to be wound on the core, supported for movement in a circular path through the core, power means to drive the shuttle to wind the wire on the core, a unit actuable by the power means to rock the chuck about the center of the core relative to given limits, electrical circuits controlled by manual switches and mechanically actuable limit switches, means under the control of the circuits to initially move the chuck and core to one or the other limit for subsequent left or right bank winding of the wire on the core, and elements energizable by certain of the circuits to cause rocking motions of the chuck and core shorter than the distance between the said limits and advancing progressively from the starting limit to the finish limit to cause bank winding of the wire on the core.

10. In a toroidal coil winding machine having a chuck to support a toroidal core at a given position, and a shuttle, for a supply of wire to be wound on the core, supported for movement in a circular path through the core, power means to drive the shuttle to wind the wire on the core. a unit actuable by the power means to rock the chuck about the center of the core relative to given limits, electrical circuits controlled by manual switches and mechanically actuable limit switches, means under the control or" the circuits to initially move the chuck and core to one or the other limit for subsequent left or right bank winding of the wire on the core, elements energizable by certain of the circuits to cause rocking motions of the chuck and core shorter than the distance between the said limits and advancing progressively from the starting limit to the finish limit to cause bank winding of the wire on the core, and a mechanism under actuable unit to rock the chuck and core to operate certain of the limit switches to cause the unit to move the core and chuck still shorter distances at the beginning and end of the winding a chuck to support a toroidal core at a given position, a shuttle for a strand to be wound on the core, supported for movement in a circular the control of the L a. 11. A toroidal coil winding machine comprispath through the core, a rocking shaft having the chuck mounted thereon whereby the center of the core will be coincident with the axis of the shaft, a driving unit actuable to rock the shaft with the chuck and core in either direction, power means to actuate the driving unit, control units to reverse the direction of drive of the driving unit mounted at spaced positions, a member driven by the driving means relative to the control units, and elements supported at variable spaced positions on the member to actuate their respective control units whereby the driving unit will rock the shaft with the chuck and core between variable limits relative to the shuttle to cause formation of coils of various sizes at various positions on the core.

12. A toroidal coil winding machine comprising a chuck to support a toroidal core at a given position, a shuttle for a strand to be wound on the core, supported for movement in a circular path through the core, a rockin shaft having the chuck mounted thereon whereby the center of the core will be coincident with the axis of the shaft, a fluid operable unit to rock the shaft with the chuck and core in either direction relative to a starting position, operable fluid control means to cause actuation of the unit, and means driven by the unit to cause operation of the fluid control means whereby the shaft with the chuck and core may be moved at selected variable speeds relative to the starting position to cause formation of various types of coils on the core.

13. A toroidal coil winding machine comprising a chuck to support a toroidal core at a given position, a shuttle for a strand to be wound on the core, supported for movement in a circular path through the core, a rocking shaft having the chuck mounted thereon whereby the center of the core will be coincident with the axis of the shaft, a fluid operable unit to rock the shaft with the chuck and core in either direction relative to a starting position, electrically operable fluid control means to cause actuation of the unit, electrical circuits under the control of limit switches to cause operation of the fluid control means, and a mechanism movable with the unit to operate the fluid control means in given sequence whereby a bank wound coil may be wound on the core.

14. A toroidal coil winding machine comprising a chuck to support a toroidal core at a given position, a shuttle for a strand to be wound on the core, supported for movement in a circular path through the core, a rocking shaft having the chuck mounted thereon whereby the center of the core will be coincident with the axis of the shaft, a fluid operable unit to rock the shaft with the chuck and core in either direction relative to a starting position, electrically operable fluid control means to cause actuation of the unit, electrical circuits under the control of limit switches to cause operation of the power means, a mechanism movable with the unit to operate the fluid control in given sequence whereby a bank wound coil may be wound on the core, and other controls in the mechanism to shorten the rocking motions of the core at the ends of the coil to make the coil uniform throughout its length.

15. In a toroidal coil winding machine having a chuck to support a toroidal core at a given position, and a shuttle, for a supply of wire to be wound on the core, supported for movement in a circular path through the core, electrically operable fluid control means to drive the shuttle to wind the wire on the core, a fluid operable unit actuable by the fluid control means to rock the chuck about the center of the core relative to given limits, electrical circuits controlled by a manual switch and mechanically actuable limit switches, the fluid control means being energized by the closing of the manual switch whereby the shuttle and core may be driven to wind layers of convolutions of the wire on the core, an element energized by certain of the circuits under the control of the limit switches to reverse the motion of the core at the said limits, and a mechanism driven by the unit to actuate the limit switches.

16. In a toroidal coil winding machine having a chuck to support a toroidal core at a given position, and a shuttle, for a supply of wire to be wound on the core, supported for movement in a circular path through the core, electrically operable fluid control means to drive the shut- 17 tle to wind the wire on the core, a fluid operable unit actuable by the fluid control means to rock the chuck about the center of the core relative to given limits, electrical circuits controlled by manual switches and mechanically actuable limit switches, elements selectively energizable at given time intervals under the control of certain of the limit switches by the closing of certain of the manual switches to cause the shuttle to form layer winding of the wire on the core, and selectively energizable at given intervals under the control of all the limit switches by the closing 18 of another manual switch to cause the shuttle to form bank winding of the wire on the core. MALCOLM O. BENNERT. HENRY E. CRADDUCK. References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,031,491 'Ihropp July 2, 1912 10 1,053,962 Alexander Feb. 25, 1913 2,196,463 Holleran Apr. 9, 1940 2,444,126 Wirth June 29, 1948 

